Protective effects of platinum nanoparticles against UV-light-induced epidermal inflammation

• Published in: Experimental dermatology 2010-11, Vol.19 (11), p.1000-1006
• Main Authors: Yoshihisa, Yoko, Honda, Ayumi, Zhao, Qing-Li, Makino, Teruhiko, Abe, Riichiro, Matsui, Kotaro, Shimizu, Hiroshi, Miyamoto, Yusei, Kondo, Takashi, Shimizu, Tadamichi
• Format: Article
• Language: English
• Subjects: Animals; apoptosis; Apoptosis - drug effects; Apoptosis - radiation effects; bcl-2-Associated X Protein - metabolism; bcl-X Protein - metabolism; Biological and medical sciences; Caspase 3 - metabolism; Cell Line; Cytokines - metabolism; Dermatitis, Photoallergic - etiology; Dermatitis, Photoallergic - pathology; Dermatitis, Photoallergic - prevention & control; Dermatology; Ear, External - metabolism; Ear, External - pathology; fas Receptor - metabolism; Fluoroquinolones - administration & dosage; Fluoroquinolones - pharmacology; Humans; Keratinocytes - drug effects; Keratinocytes - metabolism; Keratinocytes - radiation effects; Male; Medical sciences; Membrane Potential, Mitochondrial - drug effects; Membrane Potential, Mitochondrial - radiation effects; Metal Nanoparticles - administration & dosage; Metal Nanoparticles - chemistry; Metal Nanoparticles - therapeutic use; Mice; Mice, Inbred BALB C; Platinum - administration & dosage; Platinum - chemistry; Platinum - metabolism; Platinum - pharmacology; Platinum - therapeutic use; platinum nanoparticles; Radiodermatitis - pathology; Radiodermatitis - prevention & control; reactive oxygen species; Reactive Oxygen Species - metabolism; skin; ultraviolet; Ultraviolet Rays
• ISSN: 0906-6705; 1600-0625
• DOI: 10.1111/j.1600-0625.2010.01128.x

Please cite this paper as: Protective effects of platinum nanoparticles against UV‐light‐induced epidermal inflammation. Experimental Dermatology 2010; 19: 1000–1006. :  Intracellular reactive oxygen species (ROS) and apoptosis play important roles in the ultraviolet (UV)‐induced inflammatory responses in the skin. Metal nanoparticles have been developed to increase the catalytic activity of metals, which is because of the large surface area of smaller particles. Platinum nanoparticles (nano‐Pt) protected by poly acrylic acid were manufactured by reduction with ethanol. A marked increase in ROS production was observed in UV‐treated HaCaT keratinocytes cell lines, while a decrease in ROS production was observed in nano‐Pt‐treated cells. Pretreatment of the cells with nano‐Pt also caused a significant inhibition of UVB‐ and UVC‐induced apoptosis. Furthermore, we found that mice treated with nano‐Pt gel prior to UV irradiation showed significant inhibition of UVB‐induced inflammation and UVA‐induced photoallergy compared to UV‐irradiated control mice. These results suggest that nano‐Pt effectively protects against UV‐induced inflammation by decreasing ROS production and inhibiting apoptosis in keratinocytes.